Details

Written by: Stanko Milosev

Category: C#

Published: 14 March 2024

Last Updated: 14 March 2024

Hits: 3496

According to https://stackoverflow.com/a/14413414

Natively WebAPI doesn't support binding of multiple POST parameters. 

Here I already gave two examples of WebAPI with multiple Post parameters. Now I will use similiar approach to send image plus additional data, like file and folder name.

First don't forget in Program.cs to add Service:

builder.Services.AddMvc().AddNewtonsoftJson();

Controller:

using Microsoft.AspNetCore.Mvc;
using Newtonsoft.Json.Linq;

namespace UploadImageServer.Controllers;

public class UploadImageController : Controller
{
    [HttpPost]
    [Route("UploadImage")]

    public async Task<IActionResult> UploadImage([FromBody] JObject? data)
    {
        if (data is null) return BadRequest(new { message = "No image." });
        string? base64Image = data["image"]?.ToString();

        if (base64Image == null) return BadRequest(new { message = "No image." });
        byte[] imageBytes = Convert.FromBase64String(base64Image);

        Directory.CreateDirectory(data["folderName"]?.ToString() ?? string.Empty);

        string imagePath = $"{data["folderName"]}\\{data["fileName"]}";
        await System.IO.File.WriteAllBytesAsync(imagePath, imageBytes);

        return Ok(new { message = "Image uploaded successfully." });
    }
}

---

Client:

using Newtonsoft.Json.Linq;
using System.Net.Http.Headers;

string imageUrl = "spring.jpg";
string base64Image = ConvertImageToBase64(imageUrl);
var jsonData = new JObject
{
    ["image"] = base64Image
    , ["fileName"] = "magnolia.jpg"
    , ["folderName"] = "spring"
};
string jsonContent = jsonData.ToString();

using HttpClient client = new HttpClient();
StringContent content = new StringContent(jsonContent);
content.Headers.ContentType = new MediaTypeHeaderValue("application/json");

HttpResponseMessage response = await client.PostAsync("https://localhost:7028/UploadImage", content);

if (response.IsSuccessStatusCode)
{
    Console.WriteLine("Image uploaded successfully!");
}
else
{
    Console.WriteLine("Failed to upload image. Status code: " + response.StatusCode);
}

static string ConvertImageToBase64(string imagePath)
{
    byte[] imageBytes = File.ReadAllBytes(imagePath);
    return Convert.ToBase64String(imageBytes);
}

Details

Written by: Stanko Milosev

Category: C#

Published: 24 December 2023

Last Updated: 25 December 2023

Hits: 507

For this example I have added following NuGet packages:

FluentFTP

FluentFTP.Logging

log4net

Microsoft.Extensions.Configuration.Json - this package I needed because user name and pass for FTP I have saved in JSON configuration file.

In short code looks like this:

Log4NetLogger log4NetLogger = new Log4NetLogger(log);
AsyncFtpClient client = new AsyncFtpClient(host, user, pass);
client.ValidateCertificate += OnValidateCertificate;
client.Logger = new FtpLogAdapter(log4NetLogger);
await client.AutoConnect();
await client.UploadFile(fileName, "/public_html/kmlTestDelete/test.kml");

private void OnValidateCertificate(BaseFtpClient control, FtpSslValidationEventArgs e)
{
	e.Accept = true;
}

Class Log4NetLogger looks like this:

using log4net;
using Microsoft.Extensions.Logging;
using ILogger = Microsoft.Extensions.Logging.ILogger;

namespace FluentFTPasyncExample;

public class Log4NetLogger : ILogger
{
    private readonly ILog _log;

    public Log4NetLogger(ILog log)
    {
        _log = log;
    }

    public void Log<TState>(LogLevel logLevel, EventId eventId, TState state, Exception exception, Func<TState, Exception, string> formatter)
    {
        string message = $"{formatter(state, exception)} {exception}";
        if (!string.IsNullOrEmpty(message))
        {
            switch (logLevel)
            {
                case LogLevel.Critical:
                    _log.Fatal(message);
                    break;
                case LogLevel.Debug:
                case LogLevel.Trace:
                    _log.Debug(message);
                    break;
                case LogLevel.Error:
                    _log.Error(message);
                    break;
                case LogLevel.Information:
                    _log.Info(message);
                    break;
                case LogLevel.Warning:
                    _log.Warn(message);
                    break;
                default:
                    _log.Warn($"Encountered unknown log level {logLevel}, writing out as Info.");
                    _log.Info(message, exception);
                    break;
            }
        }
    }

    public bool IsEnabled(LogLevel logLevel)
    {
        switch (logLevel)
        {
            case LogLevel.Critical:
                return _log.IsFatalEnabled;
            case LogLevel.Debug:
            case LogLevel.Trace:
                return _log.IsDebugEnabled;
            case LogLevel.Error:
                return _log.IsErrorEnabled;
            case LogLevel.Information:
                return _log.IsInfoEnabled;
            case LogLevel.Warning:
                return _log.IsWarnEnabled;
            default:
                throw new ArgumentOutOfRangeException(nameof(logLevel));
        }
    }

    public IDisposable BeginScope<TState>(TState state)
    {
        return null!;
    }

}

Example download from here.

Details

Written by: Stanko Milosev

Category: C#

Published: 22 December 2023

Last Updated: 24 December 2023

Hits: 621

First console example

Start new console app

Install package log4net

Add XML file, name it like "log4netConfiguration.xml" and in properties set "Copy to Output Directory" to "Copy always":

<?xml version="1.0" encoding="utf-8" ?> 
<log4net>
    <appender name="myConsoleAppender" type="log4net.Appender.ConsoleAppender">
        <layout type="log4net.Layout.PatternLayout">
            <conversionPattern value="%-4timestamp [%thread] %-5level %logger %ndc - %message%newline" />
        </layout>
    </appender>
    
    <root>
        <level value="DEBUG" />
        <appender-ref ref="myConsoleAppender" />
    </root>
</log4net>

Here notice the name of appender: myConsoleAppender

Code:

using log4net;
using log4net.Repository;
using System.Reflection;

if (!File.Exists("log4netConfiguration.xml"))
    throw new Exception("File log4netConfiguration.xml does not exist");

ILoggerRepository loggerRepository = LogManager.GetRepository(Assembly.GetEntryAssembly());
log4net.Config.XmlConfigurator.Configure(loggerRepository, new FileInfo("log4netConfiguration.xml"));
var log = LogManager.GetLogger(MethodBase.GetCurrentMethod()?.DeclaringType);
log.Debug("test");

Second console and file example

Just change XML to:

<?xml version="1.0" encoding="utf-8" ?> 
<log4net>
    <appender name="myConsoleAppender" type="log4net.Appender.ConsoleAppender">
        <layout type="log4net.Layout.PatternLayout">
            <conversionPattern value="%-4timestamp [%thread] %-5level %logger %ndc - %message%newline" />
        </layout>
    </appender>
	
	<appender name="myRollingFileAppender" type="log4net.Appender.RollingFileAppender">
		<file value="example.log" />
		<appendToFile value="true" />
		<maximumFileSize value="100KB" />
		<maxSizeRollBackups value="2" />
 
		<layout type="log4net.Layout.PatternLayout">
			<conversionPattern value="%level %thread %logger - %message%newline" />
		</layout>
	</appender>	
    
    <root>
        <level value="DEBUG" />
        <appender-ref ref="myConsoleAppender" />
        <appender-ref ref="myRollingFileAppender" />
    </root>
</log4net>

Third WinForms and TextBox example

This example I took from here

XML configuration:

<?xml version="1.0" encoding="utf-8" ?>
<log4net>

	<appender name="myTextBoxAppender" type="log4netWinFormsExample.TextBoxAppender, log4netWinFormsExample">
		<formName value="Form1"/>
		<textBoxName value="textBox1"/>
		<layout type="log4net.Layout.PatternLayout">
			<conversionPattern value="%date %-5level %logger - %message" />
		</layout>
	</appender>

	<root>
		<level value="DEBUG" />
		<appender-ref ref="myTextBoxAppender" />
	</root>
</log4net>

<appender name="myTextBoxAppender" type="log4netWinFormsExample.TextBoxAppender, log4netWinFormsExample">

using log4net.Appender;

namespace log4netWinFormsExample;

public class TextBoxAppender : AppenderSkeleton
{
    private TextBox _textBox;
    public TextBox AppenderTextBox
    {
        get
        {
            return _textBox;
        }
        set
        {
            _textBox = value;
        }
    }
    public string FormName { get; set; }
    public string TextBoxName { get; set; }

    private Control FindControlRecursive(Control root, string textBoxName)
    {
        if (root.Name == textBoxName) return root;
        foreach (Control c in root.Controls)
        {
            Control t = FindControlRecursive(c, textBoxName);
            if (t != null) return t;
        }
        return null;
    }

    protected override void Append(log4net.Core.LoggingEvent loggingEvent)
    {
        if (_textBox == null)
        {
            if (String.IsNullOrEmpty(FormName) ||
                String.IsNullOrEmpty(TextBoxName))
                return;

            Form form = Application.OpenForms[FormName];
            if (form == null)
                return;

            _textBox = (TextBox)FindControlRecursive(form, TextBoxName);
            if (_textBox == null)
                return;

            form.FormClosing += (s, e) => _textBox = null;
        }
        _textBox.Invoke((MethodInvoker)delegate
        {
            _textBox.AppendText(loggingEvent.RenderedMessage + Environment.NewLine);
        });
    }
}

_textBox.AppendText(loggingEvent.RenderedMessage + Environment.NewLine);

_textBox.AppendText(RenderLoggingEvent(loggingEvent));

The main code:

using System.Reflection;
using log4net;
using log4net.Repository;

namespace log4netWinFormsExample;

public partial class Form1 : Form
{
    public Form1()
    {
        InitializeComponent();
    }

    private void btnLogIt_Click(object sender, EventArgs e)
    {
        if (!File.Exists("log4netConfiguration.xml"))
            throw new Exception("File log4netConfiguration.xml does not exist");

        ILoggerRepository loggerRepository = LogManager.GetRepository(Assembly.GetEntryAssembly());
        log4net.Config.XmlConfigurator.Configure(loggerRepository, new FileInfo("log4netConfiguration.xml"));
        var log = LogManager.GetLogger(MethodBase.GetCurrentMethod()?.DeclaringType);
        log.Debug("test");
    }
}